The Zenica tunnel is planned as part of the highway on Corridor Vc in the Republic of Bosnia and Herzegovina, on the section between Doboj and Zenica. The tunnel is two-tube, with one-way traffic, two lanes in each direction. The length of the tunnel is 3,351 m (right pipe). The contractor is the Turkish company CENGIZ, and the main project house is also the Turkish company YÜKSEL PROJE Uluslararasi A.S .. The company PPG d.o.o. from Sarajevo was hired for consulting services in the revision of documentation. CTP PROJEKT signed a contract as a subcontractor of PPG for the audit of part of the documentation. The audit covered the preliminary and main designs of the ventilation system and fire alarm system in the tunnel.